Question

A car needs 3 gallons of gas for 70 miles. How much gas would it need for 105 miles?

Answer 1

x = 4.5 gallons

Explanation:

1.) Find how many miles you get per gallon

miles/gallon = 70 miles/3 gallons = 70/3

2.) Set up a proportion and solve

70/3 * 105 / x

(105*3) / 70 = x

315 / 70 = x

x = 4.5

Hope this helps,

- J.M.Jamon

Pennsylvania State University

Full-time B.S.CE. undergrad student

Answer 2

4.5 gallons

Explanation:

3 is 70 y is 105

multiply 3 and 105 and 70 and y

3x105=315

70xy=70y

y=315:70=4.5

sorry I don't know how to explain it very well